Trip.com has a cool flight tracker. You can track random flights, or specific ones. If you sign up for the free flight tracker pro membership, you can see all arrivals for a 2 or 4 hour window for any airport in the country, complete with info such as aircraft, airline, origin, and if the plane has not landed yet, it will tell you alititude, airspeed, etc.. Give it a try! Tell me what you think!

It's great. My parents were flying in for a visit, and the tracker gave me the exact time the plane landed. Estimating taxi to the terminal time, baggage claim time, and the cab ride over, I was able to meet them at their hotel just as they reached the check in desk. It was amazing.

The "scheduled take-off time" is the slot?
I didn't know that. I like trip.com flight tracker. I have never had to use it to meet someone, but it could come in very handy. It is off a few minutes, btw. I have sat in my office watching flights coming into DCA, and I have checked FT for accuracy. On final approach it's off 2-5 minutes. But that's not a criticism, just an observation.